低等级公路改造为高速公路的设计要点

绥兴高速长89.3km,其中52.3km在原有二级路基础上改造,占全长的58.6%。从平纵方案、新旧路基结合部、路面改造、桥涵加宽及加固、减小对地方出行的影响和保通方案六个方面介绍了设计中的要点,可供类似工程参考。

Design Points for Reconstructing Low-Class Highway to Expressway

uixing Expressway is 89.3km,52.3km of which was reconstructed from second-class highway,about 58.6% of the whole expressway.The design points are introduced from aspects of horizontal and vertical program,combined part of new and old subgrade,pavement reconstruction,widening and reinforcement of bridge and reduction of influence on local traveling and traffic assurance scheme,providing references for similar engineering.